avoid #respond_to? in Cache.id_for

1 files changed, 8 insertions, 5 deletions

diff --git a/lib/declarative_policy/cache.rb b/lib/declarative_policy/cache.rb
index b8cc60074c7..0804edba016 100644
--- a/lib/declarative_policy/cache.rb
+++ b/lib/declarative_policy/cache.rb
@@ -21,11 +21,14 @@ module DeclarativePolicy
       private
 
       def id_for(obj)
-        if obj.respond_to?(:id) && obj.id
-          obj.id.to_s
-        else
-          "##{obj.object_id}"
-        end
+        id =
+          begin
+            obj.id
+          rescue NoMethodError
+            nil
+          end
+
+        id || "##{obj.object_id}"
       end
     end
   end